Super Bowl History - Facts, Stats and Highlights
Super Bowl 50: NFL gets the L out of Roman numerals, but just for this year's game – The Mercury News
Super Bowl Facts For Non-sports Fans: Why Roman Numerals;
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Super Bowl Facts For Non-sports Fans: Why Roman Numerals;
Super Bowl facts for non-sports fans: Why roman numerals; how to watch
NFL will not use Roman numerals for Super Bowl 50 in 2016 - Sports Illustrated